A good, old fashioned, strangle attack. Obviously that could be seen as a normal attack, so you'd have to overdramatise it e.g. Cut off background music, add that creaking bone effect, have me slowly pushing them further to the ground till they're on their knees, then finish with an echoey crack sound. Simple, but probably brutal to watch if it was drawn out over about 6 or 7 seconds.

I gesture with my right arm (or both), almost energy blast-style. As I do so, five pink, phosphorescent, and spectral vines will materialize around me (not enveloping) and quickly wrap the opponent in a hentai-esque manner for a few seconds. Then, the vines will abruptly swarm around the opponent, slithering into the person's body via mouth, eyes, and ears. The victim's body appears unharmed, however, save for a second or two of choking pain and pressure in their head. All is calm for roughly five seconds. Suddenly, the hapless victim feels enormous and excruciating pressure and pain throughout his body as the spectral vines burst out in a swarming, whipping fashion, appearing to be many more vines than the actual count, due to the speed of the churning. A nearly ridiculous amount of blood and gore sprays in every direction during the explosion, and I am spattered with blood. The vines dissipate within seconds of having escaped the person's body.

I chose pink as the color of the attack, since it occasionally used to express badassery in anime and manga. Since pink isn't a color that myself and others associate with me, I feel that the irony is good for humor, too.